Why Do Clocks Run Clockwise?
The hands on your watch chase a shadow that stopped mattering centuries ago — the sundial's shadow, in the northern hemisphere.
Articles — page 6
Plain-English guides to time zones, calendars, leap years and the date questions people ask every day.
Why Does February Have Only 28 Days?
Blame Rome: a superstition about even numbers, a calendar that once ignored winter entirely, and an emperor's month that refused to be short.
The Speaking Clock: When People Telephoned to Ask the Time
'At the third stroke, it will be...' — for ninety years, millions have dialed a number just to hear a voice announce the hour.
Why Does a Week Have Seven Days?
Unlike days, months, and years, nothing in the sky repeats every seven days. The week is humanity's own invention — and one of its most durable.
UTC+5, GMT+8, +05:30 — Time Zone Offset Notation Explained
Every time zone is just a signed number counted from one line in London. Learn the notation once and no timetable will confuse you again.
Ramadan Fasting Hours Around the World: Why They Differ So Much
In the same Ramadan, a Muslim in Santiago may fast 12 hours while one in Reykjavik faces nearly 20. Latitude writes the schedule.
Why Arizona Doesn’t Change Its Clocks (Except Where It Does)
Most of Arizona hasn't touched its clocks since 1968 — but drive across the Navajo Nation and you'll change time zones four times without leaving the…
How Railroads Invented Time Zones: The Day of Two Noons
Before 1883, America ran on more than 300 local times. Then, one November noon, the railroads reset the continent's clocks.
NTP: How Your Phone Knows the Exact Time
You never set your phone's clock — a 40-year-old protocol quietly sets it for you, correcting for the speed of light along the way.
How Atomic Clocks Work: The Machines That Define the Second
The second isn't defined by Earth or the sun anymore — it's defined by 9,192,631,770 vibrations of a caesium atom.